Press-mold for making insulators.



No. 880,343. PATENTED 1" :1a.25,190a.-

H. WAGNER.

PRESS MOLD FOR MAKING INSULATORS.

APPLIOATIOH rmm 00mm, 1906. nnnwzn JAN. 9, 190a.

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PATENTBD FEB. 25, 1908 H. WAGNER. PRESS MOLD FOR MAKING INSULATORS.

APPLICATION FILED 06124, 1906. RENEWED JAN. M1908.

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HENeYwAeNEa-or ANDERSON, INDIANA.

PRESS-MOLD FOR MAKING- INSULATORS.

Application filed October 24- 1906' Serial No.

To all whom it may concern:

Be it knownv that I, HENRY WAGNER, a citizen of the United States ofAmerica, re-

siding at Anderson, 'in the county of Madiinsulators may be made at asingle operation;

second, to provide an improved construction and arrangement of the partsof the mold whereby a stronger mold is produced and a stronger anddenser insulator may be made;

third, to'provide simple and ellicient means forsimultaneouslyprojecting and retracting the socket-forming elements;and, finally to generally simplify and improve the construction andincrease the practical efficiency of press-molds of this type..

In the accompanying drawings,-Figure 1 is a vertical longitudinalsection through a press-mold embodying my invention. Fig. 2 is ahorizontal section through the same. Fig. 3 is a vertical cross section.

Referring to the'drawings, thenumeral 1 designates a base, upon which issupported a mold comprising a bottom or base'sec'tion 2 and a body ortop section3, the latter be-.

ing constructed of two or more parts .4 and 5 adapted to be disconnectedfor the con-. venient removal of the formed insulators or other.articles. The sections of the mold top orbody 3 nia be held.connectedby any preferredtype o fastening. means, whichl have not deemedit necessary to describe.

The mold body 3 is provided with a series of mold chambers or cavities.6, while the base section 3 ,isformed with upwardly projecting coreportions 7' which extend into the lower ends of said cavities and. formthe recesses in the lower ends of the insulators.

.A chamber or recess 8 is provided in the top of the mold section 3 toreceive the molten glass or other material and also toqreceivea plunger9, whereby such material is forced through ducts or passages 10 into therespective mold chambers.- The plunger may be operated in any preferredmanner.

Specification of Letters Patent.

340.393. Renewed January 9. 1908. Serial No. 410.010-

Patented Feb. 25, 1908.

Arranged upon the underside of the base section 2 of the mold is asupporting plate 11 provided with chambers 12 equal in number to andarranged below the mold chambers, and also provided with threadedassages 13 communicating with said cham ers 12. In the chambers 12 arearranged gear nuts 14. These gear nuts are arranged to operate formingdevices 15, comprising-screws fitted at their lower endsin the threadedopenings 13 of the supporting plate and projecting upwardly throughopenings 16 in the mold section2 into the mold cavity 6. projecting endsof these screws form the usual threaded sockets in the insulators.

' Each gear nut 14 comprises a pinion hav-' ing a projection 17 engagingthe threads of the cooperating. screw, which extends througha centralopening in the pinion, the construction being such that when the inionis turned in one direction or the other t e screws will berotatedbytheir threadedengagement inthe bearing openings 13 and will becaused to move vertically, so that the upper ends thereof. will movedownward in the mold chambers to disconnect them from the. formedinsulators, while an upward 'movement thereof will project the screwsinto the mold chambers for the succeeding operation. longitudinally inthe supporting plate 1 1 with The upper Arack bar 18 isarranged toslide.

its teeth in meshing engagement withthe. teeth of the gear nuts 14 andis-pr'o-vided at 7 one end with'a handle or lever by means of which itmay be manually reciprocated, although'power mechanism of any preferredcharacter may be employed for th1s operation. When the rack bar is.moved in onedirection all the'pinions will be turned to project theforming screws, while a reverse movement of the rack bar will actuatethe ipinions in the opposite direction to retract the forming screws. Bythis means forming screws cooperating with the several mold chambers maybe simultaneously pro'ected and retracted for use in the operation 0making a lurality of insulators and to release them; cm the. formedinsulators to permit of theremoval of the latter.

other objects may be formed at one time, thus enabling'alarge number ofinsulators to will also be observed thatthe projecting ends It will beovser'ved that the construction provides a plurality'of independentmolding devices, by which a seriesof insulators O1" be manufacturedwithin a given period. It

of thescrew formers project from below 'IllOlLl is rovided, and theforce and weight mold cavities from above. 'structionand arrangei'nentoi the parts a stronger andmore' durable type of pressof' th'e p ungerare both exerted-to press the molten material into the .mold chambers,

whereby the material may 'becompressedto a higher degree of density andstronger and more durable insulators formed.

Having thus described the invention, what is claimed as new, is: I

1. A mold of the character described comprising a base provided withchambers open at one side and having threaded openings below thechambers, a body supported upon the base, said body and basehavingcooperating portions forming mold cavities arranged above said chambers,said cavities being provided with inlets, means for forcing th e plasticmaterial through the inlets into the cavities,

.a series of forming screws projecting upwardly through the base andinto said cavities, the screws being engaged at their lower ends withthreaded openings, gear nuts engaged with the screws and arranged withinthe said chambers, said nuts being partially exposed through the opensides of the chambers, and. a rack bar slidably supported on the baseadjacent the open sides of the chambers and meshing with the gear nuts.

the body and base A mold of the character described comprising abasehaving a series of vertical openings, a mold body sup orted upon thebase,

being provided with cooperating ortions forming a series of moldchambers ,a ove the openings, said mold chambers being provided at.theirupper ends with inlets, [means for forcing the plasticmaterialithrough saidchambers into the inlets, a supporting platedetachably mounted below the base and provided with. a series. ofchambers open at one side and threaded openings below and communicatingwith said chambers, forming screws projecting upwardly through theopenings in the base, and engaging the screw threaded openings in thesupporting plate, gear nuts engaging said screws and arranged in thechambers of the supporting plate, said nuts being partially exposed atthe open sides of the chambers, and a rack bar slidably supported uponthe supporting plate and meshing with the exposed portions of the gearnuts, whereby the latter may be turned in one directionor the other tosimultaneously project or retract the forming screws. i

In testimony whereof, I a'Hix mysignature in presence of two Witnesses.

